Two people were killed and at least 21 others wounded in an attack on an anti-government protest in Bangkok, Thailand, according to police.

The Bangkok Post reported that two attacks occurred against
protesters. Early Thursday morning, men in a pickup truck drove
by and shot at a guards’ line at an intersection. Two were killed
by the gunfire, and 19 others were wounded.

Minutes later, two M79 grenade rounds were fired into the protest
camp at Democracy Monument.

The wounded were hit by shrapnel from the explosion, according to
a doctor at a Bangkok emergency center, Reuters reported.

"Two people were killed and 21 were wounded," Bangkok’s
Erawan Emergency Centre said via its website. Police later
confirmed the death toll, the Bangkok Post reported.

The army arrived after the attacks to seal off the area, the Post
reported.

Protesters at the camp have called for a replacement cabinet and
an appointed administration.

Thailand has seen heightened political tumult in the last six
months after a wave of anti-government protests broke out
following years of bitterness between the ruling elite and
Thaksin Shinawatra, who, despite popularity with rural and urban
poor, was thrown out of office in 2006 by the military.

Last week, former Prime Minister Yingluck Shinawatra, Thaksin's
younger sister, and nine of her cabinet ministers were ousted
from office by the Constitutional Court for abuse of power.

Twenty-seven people have been killed and hundreds wounded since
the People's Democratic Reform Committee protests began in
November, according to police and local hospitals.